2011东城化学一模试题及答案（2011 dongcheng chemistry test questions and answers）.doc

2011东城化学一模试题及答案（2011 dongcheng chemistry test questions and answers） The second semester of the second semester of the 2010-2011 school year in dongcheng district, Beijing (1) Chemistry test paper School name admission ticket number The examinee instructions 1. This paper is 8 pages, four major problems, 35 small problems, a perfect score of 80. The exam time is 100 minutes. 2. Fill in the name of the school, name and admission ticket on the examination paper and answer sheet. 3. The answers to the questions should be filled in or written on the answer sheet, which will be invalid on the test paper. 4. On the answer sheet, choose a 2B pencil and answer with a black letter. 5. Bring back the test papers and the answer sheet at the end of the exam. 1. The relative atomic mass that may be used: H 1 C 12 N 14 O 16 Na 23 S 32 Cl 35.5 K 39 Ca 40 I 127 2. Part of alkali and salt solubility table (20 ℃) : Na + Ca2 + Cu2 + OH - soluble micro Dont Cl - soluble soluble soluble HCO3 - soluble micro (1) there are 25 points in each of the 25 questions. The following changes in life belong to chemical changes A. snow melts b. seawater evaporates c. food decays 2. The volume fraction of air composition is about 78% A. oxygen b. nitrogen c. carbon dioxide d. rare gases The most abundant metal in the earths crust is A. oxygen b. silicon c. aluminum d. iron Sodium carbonate is an important chemical raw material A. Caustic soda b. soda 5. In the following icon, it is not a fire safety sign A B C D Of the following substances, it is possible to make compound fertilizer A.K NO3 B.C O (NH2) 2 C.K 2 co3 dc a (H2PO4) 2 Eat lean meat, eggs, fish and so on. The iron here means A. molecule b. atom c. element d. simple 8. Sodium selenate (Na2SeO3) has the effect of removing the active oxygen in the human body, and the valence of Se (Se) is A. -2 B. + 2 C. + 4 D. + 6 9. In the following experiments, the incorrect is A. read liquid volume b. extinguish the alcohol lamp c. check the air tightness